I'm working on a mobile application prototype in Expression Blend 4. Up until now it has worked fine, but after re-opening the program I can no longer build the project. I get 4 errors that are all pretty much the same:
The primary reference "System.Windows.Controls.Toolkit, Version=5.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" could not be resolved because it has an indirect dependency on the .NET Framework assembly "mscorlib, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7ceec85d7bea7798e" which has a higher version "5.0.5.0" than the version "2.0.5.0" in the current target framework."
Yeah, pretty lengthy error message (which I had to type out as you can't copy from the error output!). The other 3 errors are identical but refer to different .NET Framework Assemblies (System, System.Core and System.Windows)
Any pointers on how to fix this?
It sounds like you're trying to edit a Silverlight 5 project in Expression Blend 4. That won't work: you need the Blend Preview for Silverlight 5. Last I checked, Microsoft has not yet released final bits for this. :/